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Dust Impact Monitor (SESAME-DIM) Measurements at Comet 67P/Churyumov-Gerasimenko

Krüger, Harald and Seidensticker, Klaus J. and Fischer, Hans-Herbert and Albin, Thomas and Apathy, Istvan and Arnold, Walter and Flandes, Alberto and Hirn, Attila and Kobayashi, Masanori and Loose, Alexander and Péter, Attila and Podolak, Morris (2016) Dust Impact Monitor (SESAME-DIM) Measurements at Comet 67P/Churyumov-Gerasimenko. "From Giotto to Rosetta", 50th ESLAB Symposium, 14.- 18. März 2016, Leiden, Niederlande.

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Abstract

The Philae lander carries the Dust Impact Monitor (DIM) on board, which is part of the Surface Electric Sounding and Acoustic Monitoring Experiment (SESAME). DIM employs piezoelectric PZT sensors to detect impacts by sub-millimeter and millimeter-sized ice and dust particles that are emitted from the nucleus and transported into the cometary coma. The sensor measures dynamical data like flux and the directionality of the impacting particles. Mass and speed of the grains can be constrained for assumed density and the elastic modulus of the grains. DIM was operated during Philae's descent to its nominal landing site Agilkia and detected one particle impact at an altitude of approximately 2.4 km from the nucleus surface. This is the closest ever dust detection at a cometary nucleus by a dedicated in-situ dust detector. Laboratory calibration experiments performed with compact and porous cometary analogue materials showed that the detected particle had a low bulk density of approximately 250 kg m^-3, and a radius of about 1 mm. The measured parameters can be understood in the context of a simple gas flow model. At Philae's �nal landing site, Abydos, DIM detected no dust impact which may be due to low cometary activity in the vicinity of Philae, or due to shading by obstacles close to Philae, or both.

Item URL in elib:https://elib.dlr.de/109282/
Document Type:Conference or Workshop Item (Poster)
Title:Dust Impact Monitor (SESAME-DIM) Measurements at Comet 67P/Churyumov-Gerasimenko
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Krüger, Haraldmax-planck-institut für sonnensystemforschung, katlenburg-lindau, germanyUNSPECIFIED
Seidensticker, Klaus J.Klaus.Seidensticker (at) dlr.dehttps://orcid.org/0000-0003-3671-3769
Fischer, Hans-HerbertHans-Herbert.Fischer (at) dlr.deUNSPECIFIED
Albin, Thomasmps, göttingen, germanyUNSPECIFIED
Apathy, Istvanmta, budapest, ungarnUNSPECIFIED
Arnold, Walteruniv. saarbrücken, univ. göttingenUNSPECIFIED
Flandes, Albertounam, mexikoUNSPECIFIED
Hirn, Attilamta center for energy research, budapest, ungarnUNSPECIFIED
Kobayashi, Masanorichiba institute of technology, japanUNSPECIFIED
Loose, Alexandermps, göttingen, germanyUNSPECIFIED
Péter, Attilamta, budapest, ungarnUNSPECIFIED
Podolak, Morristel aviv university, israelUNSPECIFIED
Date:March 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Rosetta Philae SESAME DIM
Event Title:"From Giotto to Rosetta", 50th ESLAB Symposium
Event Location:Leiden, Niederlande
Event Type:international Conference
Event Dates:14.- 18. März 2016
Organizer:ESA, ESTEC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Projekt ROSETTA Instrumente
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Space Operations and Astronaut Training > User center for space experiments (MUSC)
Deposited By: Seidensticker, Dr. Klaus J.
Deposited On:15 Dec 2016 08:42
Last Modified:15 Dec 2016 08:42

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